Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea8ed328fe54a5771789ba85d07ec79238a5444a381c5996e29dbdaf1d7f0418' 
  AND token = 'LatkzH6a2jgR6V3ZQGN5VHOCok237mz2ctfvJBMR+iE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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