[=WoR=Varth]

Just like dowster said. You can use GetTime,timer.
You have to make a boolean that check if it's already 10 minutes or not.

pawn Код:

new bool:already[MAX_PLAYERS]

forward enough(playerid);

CMD:blow(playerid,params[])
{
       if(already[playerid] == false) return SendClientMessage(playerid,somecolor,"You have to wait 10 minutes");
       CreateExplosion(...............);//Just like what Nero_3D said.
       already[playerid] = true;
       SetTimerEx("enough",600000,0,"d",playerid);
       return 1;
}

public enough(playerid)
{
       already[playerid] = false;
       return 1;
}