Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0de4072ed6c902bd9b071ddc9fb4c9c9cb28d0b9fff89ee7b5b7232ec919e11f' 
  AND token = 'r2ld1WmuRwgzHgzfpnP8KUcQk0tjkaNCYhAjcOLo6MA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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