I already managed to create a key and add the script to open the door.

BUT...

Every time the animation of picking up the key and unlocking the door ends, the character's hand remains raised and there is no way to lower it (unless I select some other item that goes in the right hand or activate the flashlight).

I still haven't been able to find a code so that, after unlocking the door, the animation of holding the key disappears and returns to the default state.

Does anyone have any suggestions?

Video example for better understanding:
https://www.youtube.com/watch?v=I2FzKnJiYk8