Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef242d1a10b04f5055e2be4b191fde850a8498958f4901b268bfe684fe52085e' 
  AND token = '8lQWpfEDNiE2Bh5y9aG7/EJUosJGLc2EYECpRYLtJaI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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