Okay, say you get a key from a random guy in Moscow. What’s step two? scouring through every single base door and crate throughout all of russia, testing each and every lock with the one key you got from the naked that lured you behind a dumpster?
Unless you’re jumping around your base flailing the key it won’t be so easy to raid, and besides, keys aren’t meant to be the best form of security. You’re meant to upgrade to digital locks and stuff.