SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c325fe56e80d11e7da422b4fcb61383e9d7bacf289433c93b7867482073c895' 
  AND token = 'P9KmF8qYVr0HqZ6sukizzgq2V92ywaDfChZmNozD+BM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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