Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '247a399ed4f2622dd2a13672f0970b55ce14ccd4fa5e7050cb26c1e786ce1ab8' 
  AND token = 'rOIh0h5cC7nrur8drpWspzZjlHYiqbP4YLIun3gLHJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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