Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99ae936be8ca0124ee2387ee741b40c292eef148463c8c1418171b895e30aa0d' 
  AND token = 'XzACBoT6UWZU5P/BrRNipDJLZuPM92XOKXLlt1YBX/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}