While intelelligence is relative, yes they can be conditionned for simple things (like feeding routine) snakes mainly rely on instincs which we often interpret as intelligence.Could a unintelligent species evolve in such a way to possess emotion
As for emotions while many snake owners credit their snakes with emotions, it's been seen many time over with thread titles like "my BP loves me", "My BP hates me" "my BP loves to cuddles" etc they do no possess that capability.
Emotions are located in the frontal lobe of the brain, which does not exist in snakes.
So we can make ourself feel better pretend they love us but they don't.
Sent from my SM-G900V using Tapatalk