Will he be okay?

I did a dumb thing tonight, I put my leftovers in the microwave, in the leftover container, forgetting it was wrapped in foil. I started to smell smoke, and immediately took it out. I put my bp in his emergency tub in 2-3 minutes, he isn't directly next to the source, but his tank is in the living room, next to the kitchen entrance. I don't know how much he was exposed to it, I don't really have fans or anything, so not much ventilation. He's in my room with the door shut, I am trying to air out my place as quickly as possible. I also have my bedroom window open so he can get some fresh air himself. I plan to take him to the vet tomorrow too.

It doesn't sound to me like you have anything to worry about. Your snake would have received some protection from his enclosure. Also, smoke rises, and I'm assuming your snakes enclosure isn't kept on a high shelf. You did what you could to further limit his exposure. At this point, I would just watch and wait. If you see any signs of illness, then take him to the vet.

It sounds like you did all the right things for your snake in this situation. Homebody is correct that your snake's enclosure probably shielded him from most of the immediate exposure. He will probably be okay and I don't think you need to rush to the vet today unless you see signs of a problem.

For future reference, if you need to quickly air out your home - open a window or door on opposite sides of the house if possible. The cross ventilation will air things out faster.