SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8006aaad848502dab0d068249a32a63857a43495cf314f25cf0cbc76bae505d0' 
  AND token = 'wZSJEr+FuvTGvhM/zrSc6CV+bUM9xC+FhFc1Dgfwotk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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