Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8986b94196ec92bd7177def4ba2181a70eb5b43f8a138ecbe0a15e1dd3a5d6e5' 
  AND token = 'cpDadjF5bXzg4q9bQ/FZl26uPNhRh78/m/Ed7UBkgUI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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