sql - sqlite union all optimization -

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I have a sqlite DB query that looks something like this: 

  As a group of groups, groups, groups of groups, groups, groups, groups of groups, groups, groups, groups, groups, groups, groups, groups, groups, groups, Where TMS = Group Zone Association selects all the group, originals, destination, weight, rate, GroupCZones group group, where tms = groupZone union Select all groups, destination, weight, Rate, group group as group group, where tms = groupZone   
 Is there a good way to optimize a question like this? I'm trying to create a simple scene that connects these 4 tables with the use of this visual query, taking questions about 13 seconds in the scene.  
 I tried to make indexes for 4 tables but it could not help.  
 When I talk about SQL, I am a simple newbie, I know enough to do simple things, but I am still learning advanced moves.  
 Any signs or information can be helpful.  
  
 
 
 CL told that I should run the  EXPLEN QUERY PLAN  command. This showed that two out of 4 indexes were not being used.  
 Thanks Cl!  
 I'm still thinking that there is a better way to do that query, but for now what I need to do.

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