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SELECT 
  cscart_cp_power_ext_reviews.view_type, 
  cscart_cp_pow_attr_ratings.*, 
  cscart_cp_power_rev_products.attr_pos, 
  cscart_cp_pow_attr_descr.cp_attr_name 
FROM 
  cscart_cp_pow_attr_ratings 
  LEFT JOIN cscart_cp_power_rev_products ON cscart_cp_power_rev_products.cp_attr_id = cscart_cp_pow_attr_ratings.cp_attr_id 
  LEFT JOIN cscart_discussion ON cscart_discussion.object_id = cscart_cp_power_rev_products.product_id 
  LEFT JOIN cscart_cp_power_ext_reviews ON cscart_cp_power_ext_reviews.cp_attr_id = cscart_cp_pow_attr_ratings.cp_attr_id 
  LEFT JOIN cscart_cp_pow_attr_descr ON cscart_cp_pow_attr_descr.cp_attr_id = cscart_cp_pow_attr_ratings.cp_attr_id 
WHERE 
  cscart_cp_pow_attr_ratings.post_id = 13 
  AND cscart_cp_pow_attr_descr.lang_code = 'ru' 
  AND cscart_cp_power_ext_reviews.status = 'A' 
  AND cscart_discussion.thread_id = '7683' 
  AND cscart_discussion.object_type = 'P' 
ORDER BY 
  cscart_cp_power_rev_products.attr_pos

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}