Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62baef3b1cc2f43e48def31fe5a7e6398ffb1b893a2156ec15eb82e1f349d768' 
  AND token = 'dtX8EzciIl22B3UDvTiTUql9aDm0HUrWqYrNz/UEUu4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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