a good Locksmith should have a set of skeleton keys.
In your attempt to pick the lock, picture the key, you are prolly dealing with 3 or so "waffers" they have to be turned and aligned to release the latch.. I've picked 6 pin locks tho,, and always had problems with that kind of lock..

Go figure..
BTW I worked as a Locksmith back in the day, not a cat burglar.