Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '353c339daf299c32da462e191ca32f41e8233e9100e9562518dc9d9e9042af2a' 
  AND token = '9iWErPWhk43IWoxQ0++scwgi7diS/Z8mO1+NZSm8AVo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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