A quick Google search shows that it matches the ticket format the Kings were using stretching back to the early 80s.
I found a VIP one from the '86-'87 playoffs that shows they still were using that format although this ticket is vertical.
Do we know when they filmed this one? It's certainly possible they used real tickets, but if it was after the fact they'd probably be ripped unless they went unused. My guess is the prop department just did their thing and mocked up some fake tickets.