Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20aee1640ef32e4a7bd39328055491c67750aad9955d0feb4a109ad042d3a3ef' 
  AND token = 'fQKk0dtoUi5dDwRSxin0Ulk4UE9pfcsH9JNyGmwRuvY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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