Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e9f9d606f9a3dac2ee74adff356d6d579cc2cdb32ac3c67fe02f6f6d28dc54e' 
  AND token = 'lJ08Ld2PzU5bzpF8IRYe8XRXz8xXTikW9RZbDkDUROg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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