Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d9fcb1fd9382949fd024fcb8f2659cd8a7d8a1d06e42fb3feb55c088117bb3c' 
  AND token = 'bWUYfiI9UQG0UiEuN1RMRx9DepMrN4lMtcXFNw2dZ/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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