Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed744ce87c7076229b3987dee9212492f210b0fb9fe94467ba98c2600e76be18' 
  AND token = 'sGbRheewAEa/+nfdnJEwTOY6ST48ABVH6AFU3b7UP3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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