Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aeabd4433a3c700c9f6a6e2fb7e410016893b0b2b753d6eb20de0ea0728e40e5' 
  AND token = 'NXQk+ZeN9dUegrGXXEXDErqTqhgumI3v9kBUl/CmwvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00103

JSON explain

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