Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbba36922ae45da93eb4b33fb071c6ae583148d5f614101582adc74bb7f74cef' 
  AND token = 'XyulVDl/7+ImCLVnwrJynz9xalDgTlAxlQx7vMLtc1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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