I see in your 'Explain's, the 2 queries use different indexes, the fast
one uses soc_date_idx, and the slower one uses q_idx. The trick,
perhaps is to force
soc_date_idx to be used in the 2nd case. (Adding ORDER BY soc_date might
do it, 'soc_date=X and (queue_id=Y and server_id=Z) ) might do it.
I dunno. Perhaps if you do ANALYZE TABLE, it will comply with your
desire.
Cheers,
Kent
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