From Longman Dictionary of Contemporary Englishpick a lockpick a lockOPENto use something that is not a key to unlock a door, drawer etc It’s quite easy to pick the lock on a car door. → pick
Examples from the Corpus
pick a lock• Attached to the ring was the piece of wire he used to pick locks.• If I can pick a lock open, I ought to be able to pick it shut.• He had taught them how to pick a lock, steal a car, to shoplift ... The list was endless. 