Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61a0ff43dfd4ff6b810aa21e52dfcf6d5615e6fe6654a5dbf53b02f80039a696' 
  AND token = 'p8WoAEuX9gYtod5P33jXqRopucTBTOOgij5uZDD0wsc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}