Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e341a46afe57e47e470f269e1cc888d1bfb86506c9d623b1d9b5235a109a1991' 
  AND token = 'syfaMofl41EqdgpaCGQ7Bwwl3U3DxF4b+nE8clOnFfE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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