Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34dfb722d6820d014cb324cb79b98d5237e117f2fd5b34b4db3b85a16ccddd7e' 
  AND token = '/gzjwftitsDc2r9uhctfZfQ6UHfCu7v+iQeSctxBXcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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