Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '036dd8a4af521410cf17a4c427bc08136e57dc5a7163f861042d43b7dd4f2efa' 
  AND token = 'Z2U+mKCNCiU0aIcvZnRtOdcIcXTF6mN04eBdvH9Ai6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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