Torres, who has just turned 30, has not played for his country since their Confederations Cup final defeat to Brazil last summer.
Recently naturalised Diego Costa is set to lead the line for Spain, with Alvaro Negredo, Fernando Llorente and David Villa all having good seasons and looking for places.
Torres, in contrast, has struggled for regular first-team football under Jose Mourinho at Chelsea, starting just 13 league games and scoring four goals.
But despite his indifferent form, Torres is still hopeful of getting a place in the squad for Brazil.
"The national team is very special for me and the World Cup is not just any tournament," Torres, who has scored 35 goals in 106 appearances for Spain, told Spanish daily AS.
"Those who go must be the best prepared and that's why you have a coach who picks the squad.
"I will work, which is the only thing I know how to do, and the final part of the (club) season is very important.
"We are up there in the (domestic) league, through to the next round of the Champions League and it could be a great end to the season.
"The more important matches you play and the more things you are fighting for the greater the demands and that is when I have performed best.
"The World Cup is just around the corner and those who are in the best form will be the ones to go."