A paper clip and a binder clip are usually sufficient to open any keyed furniture lock in the office where you found the clips. It actually takes longer to bend the paper clip into the proper pick shape than it does to open the lock. You can also pick them back into the locked position afterward.
That's a case where having an actual key is less useful than knowledge of how the locks work, because the key won't actually open every lock in the office, whereas the clips will.
This is why you make a distinction between privacy locks and security locks.
Most of the locks in daily use by humans on this planet are barely better than privacy locks. I once unlocked the car, got in, and started it up before the country music station on the radio made me realize that my car was actually parked in the next space over in the parking lot. It was a different brand of GM car that coincidentally had exactly the same body style, paint color, and locks as mine.
After that, I thought about trying my key in every car in the parking lot, but I never quite overcame my fear of getting arrested for it.