Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccaa9a0fb797f18286cf1e008e09d2f8b303fbc06bbb9cbaef2cb27055453bd2' 
  AND token = 'sGad7JtHCnyKs5UI6ruKQAwH1kJbKYUvPE+YoAUA2dU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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