Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e705b97b661086773f2f75f72533e81bb09d87bc78cfd89b965e87c4f2e5cdd6' 
  AND token = '0/7M2BFObF8xre0kayouPTgD9OLmoF0aTrz+wyw2zDQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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