Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d104be310c75afd1fbfe01bf7aabfad90410c85ff6dab1e8bea2f12678eb01b' 
  AND token = 'Uzg9kivPjMHL3mZi5C9Py4Y7QXy8ERjbRhf5822VN50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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