Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '178d2982f9c654085ddab09346b2fbac60962f4c04ccdfbfa1780d43084fd31d' 
  AND token = 'hvHqwoD0WzZItmfECYaZvJ7WcwqmKCMaCS8lLWCk3XA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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