1) remove the lug nut while the car is parked in garage, then put a regular non-locking one in then take to mechanic, who will do the wheel swap for free because they feel bad and I'm a loyal customer ...
Locking wheel nuts do not have standard hexagonal heads like a normal nut and bolt. They require a unique locking wheel nut ‘key’ to remove them. This guide looks at the different types of locking ...