Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11908c81406a0b7c5bbb79b1306b9c9a50d83d1fdc25ff3b5991d072d5a9d559' 
  AND token = 've7n9KqWrv3cD/RfUTqD3QF5L1YQohvQl3E1I1woBag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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