Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41e3cf10556b166714bd39efc245dc6eaff3140199a0bcf8eb446c3e6442998f' 
  AND token = 'JgQ4bhLizcygWh0qhrdl4bKykM6rw002qq942PBzkuQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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