Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '730a812cbeebd340e9c226d51bd0d9fad4a198630f9b3cb200abd4ba393a5023' 
  AND token = 'tMXllkmNM6oM1UKRbweVmfiuW5mXokWkHo9GQF9sfaI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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