Try the fuses. If memory serves me correctly, that particular fuse box is located under the dash near the drivers left foot. The fuse box under the hood is for larger items, so the fuse for the door lock isn't under the hood.
I don't think you'll find the label for the door looks however, as I suspect that door lock circuit is part of another labeled circuit. So you're going to have to either see what else isn't working, and you'll have to check all the fuses.
I'm giving this advise based on your description of the problem, in that you've said that none of the doors open or close. If it was isolated to a particular door, then I would say that a connector has broken, or that the solenoid has given up the ghost. That's why I've mentioned the fuses, and again, I don't think you'll find a descriptor on the fuse box cover that indicates just the door looks. If you do find one that says just door lock, then great, but be prepared to check them all.
Good luck and let me know how it works out.