You can go ahead and check, they probably will if they carry fishing rods and such! Check for a fridge, they'll be in little white styrofoam boxes. If it looks fuzzy..or has a bad smell, they are dead worms, put 'em down! But if you see one that looks good and doesn't smell, go ahead and poke at one with the lid, it'll wiggle and you'll know it's alive! :) We have two frogs in our house who eat earthworms so we buy a lot of worms at a time and put them in a large styrofoam cooler with food so they will live longer and we have to go to the store less often. Though no one HAS to do that..just makes it less of a pain, lol!
If you want, go ahead and call the store and see if they carry earthworms/nightcrawlers! :) Though a pacman frog wouldn't be able to eat these for a few months!