NL 10, SH, AQ, raised River, 4:1 call?

Poker Stars $10.00 No Limit Hold'em - 5 players

UTG: $6.27 - VPIP: 16, PFR: 14, 3B: 3, AF: 1.0, Hands: 98
CO: $11.85 - VPIP: 21, PFR: 18, 3B: 2, AF: 6.3, Hands: 228
BTN: $17.53 - VPIP: 33, PFR: 24, 3B: 6, AF: 7.0, Hands: 55
Hero (SB): $10.05 - VPIP: 16, PFR: 14, 3B: 4, AF: 3.9, Hands: 146701
BB: $25.57 - VPIP: 16, PFR: 12, 3B: 15, AF: 6.0, Hands: 50

Pre Flop: ($0.15) Hero is SB with A Q
1 fold, CO raises to $0.35, 1 fold, Hero calls $0.30, 1 fold

Flop: ($0.80) A 3 8 (2 players)
Hero checks, CO checks

Turn: ($0.80) 2 (2 players)
Hero bets $0.60, CO calls $0.60

River: ($2.00) K (2 players)
Hero bets $1.75, CO raises to $3.50, Hero ?

Flop, when he checks back I don't think he has an Ace ever, except something like A9 and lower and most mid-pairs make sense.

So, turn I bet for value Vs any mid or low ace, KK-TT.

River doesn't make sense, because Villain can't have AK. I don't think A2s, too.
Only strong hand in his range would be KK.

4:1 odds, when thinking that he can only have 3 combos of KK and the other stuff is a bluff.
Should I call?

Edit Villain's stats: