Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de41c0b0a3c4e84ca943f02e31bca3fb8b5385e09c71a51f375ee12d456a8ec6' 
  AND token = 'Y5sIJdh14jtmUj1acvkG94EZA0SC024hB4o9cmV+yZY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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