Warded locks are still sold by big box hardware stores and are often seen protecting lockers and access panels.
To pick warded locks you need a warded pick set. These Sparrows warded picks are designed to pick both modern and older warded locks. These warded lock picks will withstand the torsion needed to open even weathered locks.
To use these warded picks simply try each one as a standard key and one of them will open the lock.