Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69ee822203d3f738c914a8efb16ba302b35454c18b5f089c70f13fc4b9c830ba' 
  AND token = 'Yiuae7TxQYYMBvxpmq/uM3DAe2dosdjc8QxI/1QLgpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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