SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6805125a2d08e1bb54ca3390af866a8e71d54c0fe502770f50a7076c72ef489d' 
  AND token = 'j+WgSFyw+OQqCnzHJwjLTd+7EjGzSu/0smczqjwJBLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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