Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c09efd11dff471f72f846a678de19bd4df545e20e6af679b737e7d171528ac82' 
  AND token = 'TGvc9+JitdDKj4DxuGeFmCIh6/A7LyrdI44KYoc08UA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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