Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8686b38c8a022a638cb90658826b2022fd99ebea1daf97c731c25b5647ab0207' 
  AND token = '6FVBZWSwB7NftUZqQy7WcckXb1XR0DvtNwXajTOCY0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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