The Elevator Key is an Inventory Item that can be used in the game.
The Elevator Key is a small silver-grey metal key, similar to an old-fashioned draw or cupboard key.
The Elevator Key can be found hanging on a hook, behind a small circular glass panel in the wall (the panel that looks like a ships porthole)
To get the Elevator Key, Josef can pick up the large hammer that is nearby and smash the glass. He can then simply take the key from the hook.
Josef can use the Elevator Key to unlock the small secret access door inside the Elevator.
(When the secret access door has been unlocked; the Ice Spray Can will be found hidden inside the small compartment)