@Karen2913 I don't see how simply asking how to get the key is some kind of scam. If he has never booked an Airbnb before, he may just be trying to understand the procedure.
But if his communication with you feels odd, certainly ask him some questions, like why he is coming to your area.
As a onsite host with a small studio listing, you don't have the concerns a lot of "entire home" off-site hosts do. It's not like guests can sneak in 20 extra people and throw a wild party, nor does it look like there are a bunch of expensive things to steal.
Yours isn't the sort of place that scammers would target, it seems to me. I.e. someone planning to deal drugs wouldn't be booking a place where the hosts could see cars or people coming and going all day.