Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5aa02eae9535531dfdcaba887bba878aa5691fb38ee919896056052f971805de' 
  AND token = 'Q5TGdGGOkUj1ZW6vYBDRaYww6xrrF+24peRhL6aNo08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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