Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6acb9dcba6347663ceb725c5a85449b26ffdead6930c444983045de03fc6de2' 
  AND token = 'K19qkccf28g53C5/MqvCuhN+1QNC1swLkUs8NKOtS2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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