Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ae222422da13831234bbd91b0f125519d3412955e87947d6320aa91650a852d' 
  AND token = 'x1qDAH//JDrHtnGpczkdSnE0mksk7jkRcv8KcqcK6tw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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