SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '224cb5bd17da60b3e9d446fbfcd80cbe68e15331230d64ebbd7201d56573836a' 
  AND token = 'XwCJszmfTIAYKP3X+OxOYAIU0ZXD8nfNrJiFgqQ7HoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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