Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f50146fc7e1abce56ed186b4af81de7d6f038d87b71f6595b50964bb83fa9fa' 
  AND token = 'Ec7NzLpzOBZO/bNOzt7RU9AdDBuefYxEwvFhWbXrw58=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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