MYSQL, very slow order by

Question

I have got two tables. One is a User table with a primary key on the userid and the other table references the user table with a foreign key.

The User table has only

Answer 1

From 30 seconds to 0.015 sec / 0.000 sec using Quassnoi answer ! This is what I called MySql expertise ! I cut out one Join from my personal project (no join with itself)

Select ser.id_table, ser.id_rec, ser.relevance, cnt, title, description, sell_url, medium_thumb,  
        unique_id_supplier, keywords width, height, media_type 
from (    
        Select ser.id_rec, ser.id_table, ser.relevance, ser.cnt 
        from searchEngineResults ser     
        where thisSearch = 16287     
    order by  ser.relevance desc, cnt desc, id_rec 
    ) ser 
join photo_resell sou on sou.id = ser.id_rec 
#join searchEngineResults ser on ser.id_rec = tmp.id_rec 
limit 0, 9