Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30b23d5f318e70ccdd14b9a056e40f9143c0109619e480b5711ddd7f5f6f461d' 
  AND token = '67IT7U1ZTG7JMrFXTGJHn+NqNGG6yg7wWkUE2c63JEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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