Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b599cc7c0c6fb117a977812e41ca9e159077e9c350526c74a2cc8a567f46b5d' 
  AND token = 'cHkuBoHIAS3S6A8honnsBSqkHz7Ug1s3vQ8g77HWN0g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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