I have no "crystal ball" to know IF that will get infected or not...and since it's near vital functions (brain!) it would be better to see a vet with your snake.
What happened with your snake this time is what pretty much always happens sooner or later when you feed 'live'...rodents aren't grabbed perfectly & can
wiggle around just enough to bite back...they object to being dinner, after all. Bites from rodents carry plenty of germs, & this wound looks pretty open to
me, and with where it is, it might be best if it got stitched closed. That's a call for a qualified reptile vet to make though, not me...good luck.
If it's NOT closed up by the vet, it will take many many sheds to heal, and each time the shedding will tend to tear it open again. Vet is the best idea, I'd say.