Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e2e00ddb36c742b0e4460e2bf2ae4972cbb6c7720ad20d1e68b8fb7a21af541' 
  AND token = 'uyRZ3QfcV3pWAJc3zCI9OmaBycyQvTxrQ5C8b8ewriU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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