Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2cf803eab2ccbdf05adf1d18e49837bdb20ade9ce40b289cbebbdf555c5952d' 
  AND token = 'MpLIvAmZEIrOioe8plh+NwEUWc5P823rTXj5U429WKw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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