Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13a06ec8a85f86b1d8766c862db1519835f58281555a801f83dbd0092f953d72' 
  AND token = 'IX46jIAkdhO75eP8jg8RTeR+7pKhShIMf8Hp67SYGOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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