injury at work, too late to claim it?

i injured my back a couple years ago at work while moving some heavy things that i was asked to move.

for context I work at a museum (not state owned but privately owned) in New Mexico. im essentially an art teacher and was asked to move some boxes that were particularly heavy during a building/office move. doing this i pulled a muscle in my back.

ive done this before working out so i thought it would just heal up eventually but its been a couple years now (lol?). clearly i can work through the injury so im not looking for workers comp but is this something the business will cover?