Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9570a9f79da0126c69b56f9e69930095941bab966fa75c3016b23383e66157c4' 
  AND token = 'QU61XbyhbxqZDr7nOpuac4njVUZZZSxakvYwW7YTW4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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