Hand converted with online PokerStrategy.com hand converter:
$0.5/$1 Fixed-Limit Hold'em (5 handed)
Preflop: Hero is BB with Q:d, K:d.
MP3 folds, CO raises, 2 folds, Hero 3-Bets, CO calls.
Flop: (6.5 SB) 3:c, 2:h, 7:d (2 players)
Hero bets, CO calls.
Turn: (4.25 BB) T:c (2 players)
Hero bets, CO calls.
River: (6.25 BB) A:s (2 players)
Hero bets, CO folds, Hero gets uncalled bet back.
Final Pot: 6.25 BB.
I have showed some strength and I think it's worth a try to bluff the river. Yes, he might easily hold Ax but he could fold small pocket pairs. I don't like c/c because Qx and Kx are unlikely to bet here.