SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ebbf8dcc429242396be97ed1e2ec1df6d648d22b29e56f43283fe391494693f9' 
  AND token = 'XgGnxBH6qNhLukpnNBF01KgxO2zhUO6hrvkZu7Z7QvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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