Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '081be3c42666a28a61d033736a097548a5335fd462cbe7d4d7c42b68c474a88f' 
  AND token = 'dLKaSlRiy049bQNdLmqhUqidGbatKffnA4mBiKmjkwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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