Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe43f186663374d5a2b1abfd7f64e88fc96b83a3de4d7c8d512723a42656d7e7' 
  AND token = 'yiNpFop73+NnyDEy5Fuv93BkTpl3d8kVI841OkkJDcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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