Having already established that death by scorpion is unlikely...
I have been stung by a scorpion twice. The first time was 25-30 years ago, in my house, in the dark, on the outside of my pinky toe. The pain started almost immediately. Since it was the middle of the night, I called the 24 hour hotline at poison control. They informed me of symptoms to watch for (difficulty swallowing, drooling, blurred vision, and some others I can't remember), if any such symptoms occurred I was to call them back right away. Within an hour the pain had traveled up my leg, across the pelvis, and down the other leg. I have a pretty high pain tolerance. I wasn't afraid I would die, but was wishing I would. It took close to 48 hours for the pain to be gone. The second time was 6-8 months ago. Same deal, in my house, in the dark, middle of the night. Got me on the bottom of the arch of the foot (same foot). Much less pain, but still unpleasant. Smaller dose of venom? Some tolerance from being stung before? Don't know. But I no longer walk around in the dark barefoot. Any time we spot a scorpion (they are everywhere here in central AZ), it gets whacked, scooped up, and flushed. Usually the cat sees them before we do, and receives much praise for being such a good girl.
My vet at the time of my first sting told me that cats are pretty much impervious to scorpion venom. I don't know if that is true, but that's what he told me.
MM