Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '823fe47fc84f78faef4c3c45f27ceb8b922bf47ca34da21550b93eeac0c58602' 
  AND token = 'utkeAMQ/sKb4OMa5h2Sn92ArxnQr7tu5b8fbUqjgJMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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