SELECT 
  * 
FROM 
  cscart_bm_layouts 
WHERE 
  1 
  AND storefront_id = 1 
  AND layout_id = 2

Query time 0.00011

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE cscart_bm_layouts const PRIMARY PRIMARY 4 const 1

Result

layout_id name is_default width layout_width min_width max_width theme_name style_id storefront_id
2 Main 1 16 fluid 280 1200 responsive Posh 1