Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67a33e4a0eb7399e1d7bb0a73df8e8de2844ae1a46df4de32b61b370ab8839de' 
  AND token = 'E7PTnjesqjAfnWv90bxOUpF099D6WJMT+Z9AtWF9QlE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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