Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eeb38ac37d8c129d6c15601360f83b6160e176dcef1dc22ba2115fe5025a03b7' 
  AND token = '2mSLWMIdDQ6Hs4Sz5fUlOoWEXDQEdDO2ikdb6WXl+CI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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