Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46ef95a542be3c4e52e7e7ffa6f343ed86302d518e81de5447a02c922e3f170f' 
  AND token = 'WFb4rLTGjecJU9KXIfsWlQ10jDADcwqYMuTXRjPHiVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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