Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ef93cfa55de2d4aedbd254ff09bea63fab51b1ebd08aa55c9599623d4ee017f' 
  AND token = 'aj8xFFz546S/Z72ecuwikI8rZ7+0bCn4dy8BwyP9jhI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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