Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02643b8b26e853581169b12e69bbecc91623dbc19d315c596545d5f7a0798f15' 
  AND token = 'GnVE2RVhg4oeteqEpgsLEBWcJ7PtJp9Tc6k4HzDC5Xg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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