Constantine

Constantine (Keanu Reeves) is performing an exorcism and he starts by attacking the demon with magical charms on his keychain.  They hurt the demon but it is far more powerful than he expected, foreshadowing a looming threat.  It is hard to make out details in the film but these pictures of the actual prop are quite clear.

Creed

Adonis Creed, son of Apollo Creed who was the best friend of Rocky Balboa, is desperately trying to get a trainer so he can become a professional boxer.  He storms his father's old training gym and puts up his car as a bet to any fighter who can beat him.  His keychain is a metal oval with the word racing on it. 

Sicario

Emily Blunt's character is blowing off steam by having a night out after her stressful mission.  The man who she is with raises her suspicions when he empties his pockets.  His basic electronic car fob can been seen on her coffee table.

Howling 2

From the notorious horror movie.  The main characters check into a hotel and behind the desk clerk a myriad of keychains can be seen.  Even the hotel must be cheap since the keychains are not consistent.

Ballers

Spencer Strasmore (dwayne the rock johnson) comes back to his old firm to try and buy his former division in the company.  He brings a million dollars cash with him to make a statement with his offer.  He has the money in a fendi man-bag, what else would you put a million dollars cash in.  The bag has a light bulb keychain (bag charm) on it.  This keychain is made from sheepskin.  These keychains are more of a bag charm but they have key rings on them and can be used as a keychain.  So I am going to count it as such.  I have added a closeup picture of that keychain, it is a different color though.

This was most likely put in the show as product placement as are most of the other clothes and fashions.  Designers will quite often give their clothes to shows so they get screen time and publicity.

Zootopia

Judy Hopps cracked the case and races back to Zootopia.  She takes her parents farm truck.  Their keychain is a felt (fiber art) carrot.  Quite appropriate for rabbits that are carrot farmers.

Last Man on Earth

From season 3 episode 1.  The group is trying to flee their malibu mansion due to an unexpected arrival of armed people.  Their cars are blocked in by the A team van that Todd was driving.  They frantically search for the keys while Todd describes the Mr. T keychain in great detail.  They find them but not before the outsiders greet them.  The keychain is a Mr. T figure and a talking device with appropriate catch phrases.

From season 4 episode 18.  Tandy Phil Miller (Will Forte) gives the key to an RV, to his Brother (Jason Sudeikis) so that he can leave and find more people.  The keychain features a Mexican flag behind the Virgin Mary.

Star Trek: The Next Generation

From Star Trek: The Next Generation season 2 episode 12.  Riker, Data, and Worf are investigating a strange alien structure on a planet.  They beam down to discover it is a recreation of a pulp novel where the setting is the Hotel Royale.  They receive room keys from the front desk and are confused by the ancient keys and keychains.  They most likely have never seen anything like them before.

Blade II

During the last scene of the movie a keychain can be seen.  It is similar to a hotel keychain.  One of the minor villains in the film is visiting an adult entertainment shop and is getting a key for a room for a private show.  But who could possibly be waiting for him...

Archer

From season 6 episode 4.  The gang is trying to get into Mallory's home to check on her and the baby.  Pam has a dolphin keychain and Carol (Cheryl?) has a wooden block keychain.  Pam has an affinity for dolphins and this is another example.

Jurassic World

Claire is trying to escape the mayhem with her two nephews in a Jurassic World truck.  As she starts the engine the keychain can be seen.  It is the classic Jurassic Park logo of the T-Rex skeleton. 

X-Men: Days of Future Past

Wolverine (played by Hugh Jackman) travels back in time to prevent the sentinels from destroying the world.  He arrives in 1973 and immediately encounters some gangsters who want him dead.  He quickly dispatches them and then takes their car.  The gangster's keychain is a white rabbit's foot and a Buick Riviera medallion. 

Naruto

From season 1 episode 20.  Naruto is leaving his home and he locks his door which shows off his keychain.  His keychain is a miniature of another character in the show, Pakkun (a creature who is summoned by Naruto's sensei to aid in missions).  At this point in the show that character had not even been introduced yet so this makes it a bit odd.  Possibly it was a intended for fans of the comic which probably came before the show.

Deadpool

Among the many little easter eggs and jokes in the opening title credits scene in Deadpool is a little keychain.  The keychain is of two figues doing the deed.  Apparently the hired goons Deadpool is disposing of had a sense of humor too.

http://www.artofthetitle.com/title/deadpool/  Has a thorough breakdown of the opening titles.

Frasier

From season 11 episode 17.  This is probably the only visible keychain in the entire run of the show. Frasier has a patient with kleptomania in order to feel more excitement in her life. At the end credits scene Niles steals one of Frasier's sherry glasses and Frasier steals Niles' car keys.  As they exchange their stolen items Niles' Mercedes keychain is seen, which is appropriate since he drives a Mercedes. 

Better Call Saul

From season 1 episode 1 "Uno".  Jimmy McGill who is destined to become Saul Goodman (played by Bob Odenkirk) is at his brother's mailbox.  His brother has a condition where electromagnetic radiation hurts him.  Jimmy puts his electronic devices in the mailbox so as not to bring them close to his brother.  This includes his red electronic keychain for his car.  Which is the same exact same keychain that Walter White uses to operate his turret gun in the final episode of Breaking Bad.  Coincidence from a lazy prop master or a clever call back?

American Dad

From season 7 episode 10.  Roger shows off his FogHorn LegHorn keychain as proof that he cannot refuse anything with the word leg in it.  Because this often featured persona is named legs.

From season 10 episode 7 big stan on campus.  Stan is furloughed from work so to make more money the rest of the family starts a bed and breakfast.  The room keys can been seen behind roger's desk.

From season 12 episode --.  Stan and Hayley are at a Bazooka Sharks game (arena football) and Stan cannot think of something to talk about with Hayley.  So he comes up with the excuse that he needs to buy a keychain.  Someone offers him their's but he pushes her aside anyway to run away from a potentially awkward conversation with his daughter.  The keychain is an adorable bazooka wielding shark.