Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '289b45b7dc53410981e19f1473ae83fe0c65f533e1211824f19d7d5c1e260a03' 
  AND token = 'hcxmrUjG235hEs2oUp8LNBYHvB19OyueZbtNIzD7/iI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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