How screwed am I?

[u/Capable-Temporary-68]

This is my first time changing my tires (2016 civic) im assuming I put too much force into the wheel lock key that it kinda snapped inside of the nut? I can order a replacement key easily but what do I do about half the key being stuck inside the nut? Thanks.

[u/Unfair-Information-2]

3/4in 12 point socket, hammer. I think i use a 3/4 for 19mm i can't remember. I would have too look at my sacrificed sockets from autozone.