Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e91aba1df8bc99680560b090fbd0d43cdfd372c95235eef09bd1120c28f25f4b' 
  AND token = 'DONuNNRTQDZ4v3U09tnUkHQA2RlHvuKucVE5wP/Ln7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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