Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '666d1940200921e751f58a8b01234dd805263497ab55fe4a76180ad5a6fba493' 
  AND token = 'pnI5Ny7yUFXzWCM3hrwgEdkB7xvSdhorrxKjqzT7NC4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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