@pejacoby can you show me the keyway?

Just looking at the manufacturing and age, I suspect it might be a wafer, or at least have a wider keyway and no security pins. In which case, you can probably jiggle it open with an appropriate piece of metal.

@pejacoby yup, wafer lock.

Find anything vaguely key-shaped (tall enough so that it can apply some rotational force when you try to turn it, thin enough to move around in the keyway, long enough to extend about an inch into the lock).

Then apply *light* turning force in a clockwise direction, while jiggling it up and down rapidly so that it nudges the wafers upwards in the front and back of the lock.