Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ecad1ad36180f1d6b28075e0fc44227cdd2e56b80c3a62b2bd351c39264b40c' 
  AND token = 'ddd+SekU0PpK8389VXXfhB2Dcfhxifq7F4yuvVvLen8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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