Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1504180abe00692aa58fe109f6681529048e42e6302c7aff8c66b3b97d5bd0c1' 
  AND token = 'knQ1V/a6f2YAjpO5L85lk0uPwVbPxWOYbSQF8MTsvNs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}