Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb68bffa8bd30b4772bf08ae5533f672c20ba53dcbc8682154f7e7a52d8ab658' 
  AND token = '8QTafpn/g7iHswV2z77H3EHUyD+D4dvWF5lYP8tmcho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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