If it were me, I’d take it...and then try to identify the owner by the contents. I doubt I’d turn one in to a ticket booth. I know I’m honest, but I know nothing about the person in the booth.
Token booths are equipped with cameras that record the (unionized, $30,000 a year salary) clerks’ every move. Even when you hand it to a cop, you are handing it to a complete stranger of indeterminate honesty. (And here’s the kicker - according to the article, these people walked by uniformed cops without handing the wallet over).