Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d05c6f712fed564eb391d261232a9bb674e46d7cb01fb84d9d9c162d20b5d84' 
  AND token = 'RXtDpbe/Oeq3/Dahdyo2ypsxm9IrnSRJ2pxPregs1ic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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