With eight-games remaining, Barca moved to 76 points and extended their lead at the top of the standings to 11 points over rivals Real Madrid in second place. Atletico remain third on 60 points.
Barcelona halted Atletico's 13-game unbeaten run thanks to a quick counter-attack in the 44th minute.
Raphinha controlled a long ball down the right channel and crossed to Torres on the edge of the area and he calmly slotted the ball past goalkeeper Jan Oblak.