Call on the turn? Top pair mid kicker

[maverickai]

Preflop: HERO is on the Button with 7 K
4 folds, CO-1 calls 0.25, BB checks, HERO calls 0.25, SB raises to 0.40, BB calls 0.25, CO-1 calls 0.25, BB calls 0.25, HERO calls 0.25.

Flop (2.50) T 8 3
SB checks, BB checks, CO-1 checks, BB checks, HERO checks.

Turn (2.50) K
SB bets 0.50, 2 folds, BB calls 0.50, HERO calls 0.50.

River (4.00) 7
SB bets 0.50, BB calls 0.50, HERO raises to 1.00, SB calls 0.50, BB calls 0.50

I ran stove, and the equity is as such on the turn:
Kd7d 40.4%
SB 29.8% (Range is broadway)
BB 29.8% (Range is broadway)

This goes to show my odds of winning is approx 1:2.3. The pot is giving me 3.5:1 for me to call. This is definitely good odds, but I am pretty sure I could be beat, cos my kicker is mid, and BB comes along to call following SB's bet.

How do I make such a decision? Fold or call? Or raise???