Not generally, but with the meaning "ice cream" it's indeed pluralia tantum. The singular lód just means ice.
Lód can also be used to refer to ice cream, but it's very informal (so we wouldn't teach it anyway) and it specifically means "a portion of ice cream meant for one person".
I mean, I would call ice cream on a stick "lód", so this form seems rather common to me. But if I buy a one liter box, or even an ice cream cone with a few scoops, I'd say "lody".