Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e01db8cb7bf12eee70df718286f21e181951a4ce5b07b8215c6ed1710752381d' 
  AND token = '8gAg6XCt/lNPwUKWsDHpo7VayO7txzVwoKebqS25+2k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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