Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c736e63a57338d7161a26093a50507222f4cb0c4b23a2d4e1d32dedae5d26ab1' 
  AND token = 'IIXW8Tqp095HoMWZh9yJAv95RAfrw1svr3vTPheco84=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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