Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3cfbce6771417608bf693dcab4f61ecbaf95ff032ce32ba64640ed2ac55ee483' 
  AND token = 'GYXqEv+KZGxIDUGOt5Akyi/4lV84GvQjy/789fcV5C8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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