If you want your snakes to live full & healthy lives, I'd get them out of there for a few days. As Hugsplox said, reptiles are far more sensitive to chemicals like this- but they cannot speak up & may die a long slow death- refusing to eat & just going downhill if they're exposed, or get cancer.
I'd call the pest control company & ask what they recommend for BIRDS in the apartment (known to be sensitive) in this situation, & pay attention to what they say. Or, don't bother taking their word for it at all- just don't let your pets be exposed to the stuff.
BTW, when I was in college, I shared an apartment in a no-pets building for a while. Someone in the building had a cat, & the next thing you know all the apartments had cat fleas jumping out of their carpeting. One day when I was in class, with NO warning (because there wasn't supposed to be any pets) they sprayed the building & I came home to find my hamster dead. Do NOT expose your snakes to this "stuff".