Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '263c88d4229990bdfc2852e4396ec10fa3ca50f6126a53d3d7b11998ae1a8616' 
  AND token = 'C+STDQhP/1nY0gyD0wxpYK7mHAXdIXuKCnt9M+vSS6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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