Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '967b4c94ae786407423c334c9636c4e1ae1a7d9919a4626ef362a07e82f52970' 
  AND token = 'ByKAEAvcfw8S8WSpAZkYoWGPsWHBWYsYm5nGJ+7UBus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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