Well, uh, let's see. She attempted
to open her apartment with her car KEY...
The Big Bang Theory Season 2, Episode 3
From that KEY maker? I highly doubt it.
The Big Bang Theory Season 2, Episode 16
That's the time we need
to obtain a KEY piece
Money Heist Season 3, Episode 3
And Dolores has the only KEY
locked away in her mind.
Westworld Season 3, Episode 8
to lock away your treasure.
Westworld Season 2, Episode 7