Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a532d93dc01d8b0829d9c962ea8ec96b9121927d83b55099642ca5e4343826a8' 
  AND token = '9hYpGApdaw3qXSKNwLi6kutBlmJpaaqymuemhPj0Txg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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