Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1f9c66f056a5feab38a8cf721d8fa5c7a21ef48027e7f516723f796fc072467' 
  AND token = 'LPBlGA1zYLYBxwXG0FSxJWxa2tdRSO1hUxwmzRWkXec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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