Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbcdef1d1f363e3739bda0586d6c6338390b29e4c226952cf3bf04ed0613d862' 
  AND token = 'YL7bD6jeYuMqfzAcKp/O7yNjFzrUwpEu5b0FBzjbNDw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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