Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9e28fdeb705b8644ef57ca94df059f05ac81ed5f6d2b2f62feee93e5dbeb72b' 
  AND token = 'dIJRm3xaLspHA2fJJ5inJIEKHK2LcYpIs+qweb3oZfk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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