Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04aa1722ce048f95939013e0fe6c2acb83547bd95e9dac477ba04b79a4681cf2' 
  AND token = '+uPrTew+OD48Be77x6Qtl/Vz9BhszZPP6cfKf0J17G0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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