SELECT 
  c.* 
FROM 
  cscart_bm_containers as c 
WHERE 
  1 
  AND c.location_id = 16

Query time 0.00022

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE c ref location_id,location_id_company_id,location_id_position_company_id location_id 3 const 4

Result

container_id location_id position width user_class linked_to_default status company_id
59 16 TOP_PANEL 12 Y A 0
60 16 HEADER 12 Y A 0
61 16 CONTENT 12 content-grid Y A 0
62 16 FOOTER 12 Y A 0