Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '68cd94bca55cacbb08ff9481dc0683d5696f27939185ee2892649bd7b1df1b50' 
  AND token = 'hD3N5RpKBpdqYDlYeLC1YHhM5mtaRYX8qE+XJHD18cA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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