"Yes..." said Ron softly, "It's the only way... I've got to be taken."
"NO!" Harry and Hermione shouted.
"That's chess!" snapped Ron. "You've got to make some sacrifices! I take one step forward and she'll take me –– that leaves you free to checkmate the king, Harry!"
"Do you want to stop Snape or not?"
"Look, if you don't hurry up, he'll already have the Stone!" There was no alternative.
(Harry Potter and the Sorcerer's Stone)
Does already with future tense mean "at once, right away", or what does it mean?