Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '100f7659af4cc7c5ea5cbe70ddaeabec7bb33f68842df018875955ad878c4dcb' 
  AND token = 'VX02gdutnb28XwSRWwpUlpqxcCwtd1F7bZmIF+vKpgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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