Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9c41b337839c940b20a88b6b79ab371dedc94ee7947077069670b12f791e129' 
  AND token = 'fBG3CKKKZCihpwbNweK+kj842hRI1dQ7gHWfGReAc6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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