SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13bd59ad890217b16c61dced0b8a08e4ed1d53b1a98148267fd7ce572c3b4df6' 
  AND token = 'H3hOucP+uqSrnv+pxrvqZMMdSwVUBqaoVwSi9EuZLJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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