Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13e8d675f63652efd22869d6cb1d5e85ce85040eeff546ac67c9c0b3f2cb60b2' 
  AND token = '4nJfQTk7H+jRFAWzGxRpKDUuQEGgaXSKxTD96k+oOws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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