Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e16ac2c2b751a5aa5eca0268ca8d53045e1a4b8df62b7c5a65909f204d3eb97' 
  AND token = 'N/Z6pzxw8IJVjXsQ0q/09MQrXFRLsLhS50BahZSECBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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