Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a05730e5e01334f3b8c88cb08033c5dda0cbbfe402af9619388e733a2bede0da' 
  AND token = 'fDJZ7wrN+IJ5JVE8/zwofiPPjPdwtYsQZEZi7SYX7YY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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