Sandbox

SELECT 
  COUNT(*) 
FROM 
  cscart_promotions 
  LEFT JOIN cscart_promotion_descriptions ON cscart_promotion_descriptions.promotion_id = cscart_promotions.promotion_id 
  AND cscart_promotion_descriptions.lang_code = 'en' 
  LEFT JOIN cscart_storefronts_promotions AS storefronts_promotions ON storefronts_promotions.promotion_id = cscart_promotions.promotion_id 
  LEFT JOIN cscart_promotion_images ON cscart_promotion_images.promotion_id = cscart_promotions.promotion_id 
  AND cscart_promotion_images.lang_code = 'en' 
WHERE 
  1 
  AND IF(
    from_date, from_date <= 1730937939, 
    1
  ) 
  AND IF(to_date, to_date >= 1730937939, 1) 
  AND status IN ('A') 
  AND (
    storefronts_promotions.storefront_id = 3 
    OR storefronts_promotions.storefront_id IS NULL
  ) 
  AND 1

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}

Result

COUNT(*)
0