SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82c201d8c0dea6578ec8b987d7169b7b68f7d11d8e8a0cd6b2bf4fea9f671945' 
  AND token = 'SDbAg5J/Q3zqX9T/FdM2grdLK3IqBCEwAmYSZa+1K9E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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