10NL : Unknow Donks Flop

Villian Stats : (VP$IP/PFR [Street Aggression] 3-bet%)

Less than 20 hands on villian.

My Thoughts And Questions

Hate this spot vs unknow. dokning into me with a medium strength hands on a drawy board. If i knew he doesnt donk a lot then i could be pretty sure that this was him trying to protect a Q. Where if he donks a lot then i can add a lot of middle/bottom pairs and draws into his range.

What would be the best way to react to the bet here ?

Poker Stars $0.05/$0.10 No Limit Hold'em - 5 players

CO: $11.50
Hero (BTN): $10.00
SB: $6.00
BB: $10.65
UTG: $5.55

Pre Flop: ($0.15) Hero is BTN with J:spade: J:heart:
1 fold, CO calls $0.10, Hero raises to $0.40, 2 folds, CO calls $0.30

Flop: ($0.95) 9:club: 4:heart: Q:club: (2 players)
CO bets $0.60, Hero?