Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '689afb5d0d2e41383b061b43de6a45d34c433dc98ce63b000e1da18e0a90916f' 
  AND token = '0kYl6gR67MQY+XWUPQBaV2oEiyFoFvnw+ODABpIcCRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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