Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a665b5064cf759467ac145b00379a845d921f4f155124b81005b027910d329b' 
  AND token = 'j5cWiDGqaWzqo4N1JRd1AlvQpf771grHNuAAEGMb4nQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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