5/10 uknown player takes wierd line

[queenhigh]

5/10 Online. 5 handed, and I dont know anyone at the table, so I only buy in for $500 till I figure these guys out. Villain's got around $1100

I get J10s in the BB, UTG limps, button min raises to $20. I call, so does UTG. Flop is J62 rainbow. I lead for $50, UTG folds, button min raises to $100.

This is a typical weak player's AA/KK line, but it could also be AK or a pocket pair. What percent of the time do you think I'm ahead here?

I call the min raise. Turn is a brick. Pot is $260, i've got $400 left. What's the plan?