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SELECT 
  items.chain_id, 
  items.product_id, 
  items.products, 
  items.modifier, 
  items.modifier_type, 
  items.date_from, 
  items.date_to, 
  items.display_in_promotions, 
  items.status, 
  descr.name, 
  descr.description 
FROM 
  cscart_buy_together AS items 
  LEFT JOIN cscart_products AS p ON p.product_id = items.product_id 
  LEFT JOIN cscart_buy_together_descriptions AS descr ON items.chain_id = descr.chain_id 
  AND descr.lang_code = 'en' 
WHERE 
  items.product_id = 15312 
  AND items.status = 'A' 
  AND (
    (
      items.date_from <= 1727474400 
      AND items.date_to >= 1727474400
    ) 
    OR (
      items.date_from = 0 
      AND items.date_to >= 1727474400
    ) 
    OR (
      items.date_from <= 1727474400 
      AND items.date_to = 0
    ) 
    OR (
      items.date_from = 0 
      AND items.date_to = 0
    )
  )

Query time 0.00039

JSON explain

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