To open a lock on your dresser drawer, you need to unbend a paper clip. Then, push a binder clip together with the paper clip into the center of the lock. Turn them counterclockwise for the lock to unlock. You can also try sanding the wood surfaces for the drawer to be unlocked easily.
If it is your dresser, why don't you use the key? I suspect it is somebody else's dresser and you want to break in. Whatever is in there is none of our business and you are doing something wrong by picking the lock.