Lomachenko is widely considered one of the best boxers on the planet -- he's the unified lightweight champion of the world ... and hasn't lost a fight since 2014.

Loma has a fight this Friday against Anthony Crolla on ESPN+ -- but he's an OVERWHELMING favorite and expected to beat the ever-loving dog snot out of the 32-year-old Englishman.

So, once he rolls through Crolla, ya gotta think Vasyl is looking for a payday fight -- and Conor McGregor would definitely get him the millions of dollars he wants.

And, the good news for Vasyl ... he thinks it'll be the easiest work of his career -- essentially saying Conor's boxing skills are "amateur" at best.

"I enjoy this fight," Loma said about possible McGregor matchup ... "I will go through this guy. No problem."

The big question ... what does Conor want? He "retired" from MMA but nobody believes he's done fighting for good. And, he seems to want another shot at a pro boxing match after losing to Floyd Mayweather.