Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e9638cbc1159e0ee032bbab1708e14eda5ea4d4a59aaaad7ff522b791095a66' 
  AND token = 'XPXVWmXUD6QcxI1xoWRzFkmjnE7Br5oEeP8I03OrORQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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