I think there is always hope, but the best approach is to see a vet. In the meantime, if you can get one of those feeding syringes for reptiles (they have a silicon tube that will not damage a snake's throat) you can give the snake some Gerber baby food, like strained turkey or something like that. This will keep it alive. Also give it a little water. I kept a cornsnake baby alive for quite awhile on Gerber until it fed on its own. I added some vitamin/calcium powder that I use for a box turtle.