Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1afd3ca791908014efbf1249ee3c2f2b55aa8ec9c140661c2feac1e9da21e58' 
  AND token = 'V1fd81b40MpcVdYj+GyJVA4ApH3Uqm9O/vDf3HxGWqw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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