Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09823c313bf3afb3ed9da63df0e655ba521aee92fb7625ddd0a2fb632bf263ff' 
  AND token = 'N0snkcL8VgQOmCrb10hqNQUe27Odo/y0VR6bZ04dcFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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