Family Guy

To convince everyone to join the tea party (which is actually a front for big business) Carter Pewterschmidt throws arm fulls of "stupid awesome keychains" into the crowd.  A man picks one up and says "oh, my God.  It's the keychain from the dream."

Season 10: Episode 21 Tea Peter

Goldbergs

Barry, the oldest son, is learning to drive and his grandfather is learning to live without driving.  The grandfather gives his keys to the eldest girl and barry gets keys to drive the car.  The keychains featured are a Cadillac logo keychain and a blue rabbit's foot.

Season 1:  Episode 1

Memento

The main character Leonard, played by Guy Pearce, is staying at the Discount Inn.  His room key and its blue keychain can be seen several times throughout the movie. 

Back to the Future

The keys to Doc Brown's time machine Delorean have a keychain with the doc's name and address written on it.  The keychain is a ball chain style.

When Marty returns to the present he finds his life and family's life has been changed.  He now owns his dream truck.  His keychain can be seen when Biff hands him his keys and keychain.  His truck is a Toyota but I can't tell if the keychain is for a Toyota.

(There is one other keychain in this movie and I will post them if I can get screenshots)

Psycho (1998)

Vince Vaughn plays Norman Bates in this 1998 remake of the classic Psycho.  The motel keys and numbered keychains can be seen in the office throughout the movie.  There are 12 rooms and 12 keychains. 

The Secret Life of Walter Mitty

Walter Mitty (Ben Stiller) is renting a car in Iceland.  They only have two which is shown first by the fact the rental agent only has two keys on his key rack.  They have the basic plastic white keychains attached.  (this was taken from the trailer for the movie)

Men in Black

Tommy Lee Jones' character K has a unique metal cone keychain.  It looks like a carpenters plumb.

Equilibrium

Christian Bale's character is out in the "nether" (outside the city walls) trying to hide a puppy in his trunk.  His keychain is a blank (probably) silver oval and a long metal rod.  It matches his character who is supposed to be completely emotionless. 

Duplicity

Clive Owen and Julia Roberts are corporate spies who use a rubik's cube keychain to signal each other.

Dylan Dog: Dead of Night

Dylan is being driven by his newly zombified best friend; his white rabbit's foot keychain can be seen in the ignition.  (The box if filled with wooden tipped bullets to fight vampires.)