Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecdb3400a86df0209c5741b369b5dff50a3c1a69eaeedd50291177776e331d09' 
  AND token = 'ymIyLNxdSmsPVZdDzKxxxsB2lOjfq201W70rYnhawbs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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