MySQL weapon shop system (question about massive columned table)

I made a system of weapon shop but a lot of columns are required, a column for each weapon.
the more columns you got the slower it works, what should I do because i've got like 37 weapons there.
I mean i thought about making user_melee, user_pistols, user_shotguns, user_smg tables, but idk if it would be effective if it's just system that has so many columns.