Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70392e4e43ecb29a9ca0439c6ab864f0f564f359a081c95b1b27d8d1645fe2db' 
  AND token = 'JFzGeQk6ESqzCCGIWGi3Bcgq+zc/FV2JknJf40nubro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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