Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04dcf34e391c3babf0980b1d4fa7166130c8230dd463e42a708958ffc384cc1a' 
  AND token = 'L+fEZtnEr2UWs83RgF8pNjgg2uCKqFt0c7hG5bH3YZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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