Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9f4787ce120fac1567975758cbbeb5b1c9a16d47808cf2791acab7964539af5' 
  AND token = 'ABTNHyrh+bJ66JhP5vh6SLrOkeip2uKPs6CQSm/mdjI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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