Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40f730d20fa1a5b52dcde079af306bd3bd2358c6028760db381c8daa4a828e6f' 
  AND token = 'pJ1iiLPczlIGjaDkYGtOPeR1yc6jHvZ2jYBOXDk8O+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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