Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6b1d4fab97a0386edf86b1817e25c0ec4d4d7dfd108d2fd6f381f8b47aeb32f' 
  AND token = 'vjzOYqTK/yIDO3tj7J3/KxP3hD1xfTvkudWUKtpQuYk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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