A statue of a key?
What?
Anywho...
Look around the room carefully.
It's all white. Completely. What you see is that you get.
Break the statue

Stained glass. Inside was...a red key.
Bend the vent bars, they look flimsy enough.
You break your right arm trying to bend the bars.
Although after serious pain, you had just strained it.
look on the vent on the floor
and then look on the one on the ceiling too for good measure
They both are vents.