Electrical Codes Pertaining to Electrical Near/Under Gas Cooktops
Nope.  You must be able to remove the cover of every box, without disassembling or modifying any part of the building.  Even a lift-out false back on a bookcase is dodgy.

Since this looks like surface mount, and it's on flexible cable or conduit... unscrew it, move it down a few inches, done.  Your jurisdiction will likely consider this movement a trivial repair that doesn't need a permit. They sure won't pass the work as it is.