Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0d837b9d689948fc4e0569727b9b337bb6abc3653a7db8c28afd7fee99d28c8' 
  AND token = '7Xl2uQaX90VH1noc/DBNOrWKVxURHMT5HlXHGqlBdLk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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