Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '01828ad8ce651fb441ed05981bef77df8fe187516770321fbfe6bd08322ae4c2' 
  AND token = 'jWiTNA9FsOfEa/mBw9HaksvdvuPX7edKyH2vEZHODf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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