It was fairly early into the tourney, was it too early to make this kind of move or am I always in trouble here? Would a flat call be better?

PokerStars No-Limit Hold'em Tourney, Big Blind is t30 (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP1 (t1450)
MP2 (t3220)
Hero (t1150)
Button (t2330)
SB (t1660)
BB (t760)
UTG (t1470)
UTG+1 (t1460)

Preflop: Hero is CO with K, A.
1 fold, UTG+1 calls t30, MP1 raises to t120, 1 fold, Hero raises to t400, 3 folds, UTG+1 folds, MP1 raises to t1450, Hero calls t750 (All-In).

Flop: (t2675) 3, J, 9 (2 players, 1 all-in)

Turn: (t2675) 9 (2 players, 1 all-in)

River: (t2675) 8 (2 players, 1 all-in)

Final Pot: t2675

Results in white below:
MP1 has Qc Qd (two pair, queens and nines).
Hero has Kc As (one pair, nines).
Outcome: MP1 wins t2675.

You have position and you're deep stacked, so I like calling preflop.

But it's early and the donks are alive and deep stacked, so you could have the best hand.

I like the way you played it.