|IMPORTANT - Speedup your database using an index|
It is very important that you make a correct index on your database. This can make you database 100-200 times faster.
All columns that are used for searching in your sql-where-clause should have an index. You can only have 16 indexes on a tabel, so only use an index on the important/right ones.
Important: the support-department will not handle support requests regarding slow databases if they don't have an index.