Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce4433c6630738c20007b5f7121c28c58051da0e4706c6f05099b195ac423426' 
  AND token = '5y/8OmkNrPfO/mZgv9NN0ay7daQe743m6/eXC3IeYpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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