Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf459904e1c61bf908e78a92315d6afe0b41f1ddb146ce90b005db3ff4bc8a5f' 
  AND token = 'zNGZTFvzMmryZKQawbxvnnR5cb/qfceXZ8SxuYEBuUs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}